12535220 has 12 divisors (see below), whose sum is σ = 26324004. Its totient is φ = 5014080.

The previous prime is 12535219. The next prime is 12535247. The reversal of 12535220 is 2253521.

It can be written as a sum of positive squares in 2 ways, for example, as 6522916 + 6012304 = 2554^2 + 2452^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 626761 = 12535220 / (1 + 2 + 5 + 3 + 5 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 12535192 and 12535201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313361 + ... + 313400.

It is an arithmetic number, because the mean of its divisors is an integer number (2193667).

Almost surely, 2^12535220 is an apocalyptic number.

12535220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12535220 is an abundant number, since it is smaller than the sum of its proper divisors (13788784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12535220 is a wasteful number, since it uses less digits than its factorization.

12535220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626770 (or 626768 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 12535220 is about 3540.5112625156. The cubic root of 12535220 is about 232.2972062956.

Adding to 12535220 its reverse (2253521), we get a palindrome (14788741).

The spelling of 12535220 in words is "twelve million, five hundred thirty-five thousand, two hundred twenty".